54997278 has 96 divisors (see below), whose sum is σ = 140050944. Its totient is φ = 14074368.

The previous prime is 54997273. The next prime is 54997291. The reversal of 54997278 is 87279945.

54997278 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a self number, because there is not a number n which added to its sum of digits gives 54997278.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54997273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 279076 + ... + 279272.

It is an arithmetic number, because the mean of its divisors is an integer number (1458864).

Almost surely, 2^54997278 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 54997278, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70025472).

54997278 is an abundant number, since it is smaller than the sum of its proper divisors (85053666).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

54997278 is a wasteful number, since it uses less digits than its factorization.

54997278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266 (or 249 counting only the distinct ones).

The product of its digits is 1270080, while the sum is 51.

The square root of 54997278 is about 7416.0149676224. The cubic root of 54997278 is about 380.2889722535.

The spelling of 54997278 in words is "fifty-four million, nine hundred ninety-seven thousand, two hundred seventy-eight".